science Flashcards
___________ refers to the very gradual process by which some species replace other species in an ecosystem
succession
_______ _______ is the gradual growth of organisms in an area that was previously lifeless such as a bare rock
primary source
the regeneration of a forest area is and example of _________ __________
secondary succession
the control of insect pest through their natural enemies is called ________ _________
biological control
habitat loss and the introduction of exotic organisms or __________ __________ into the environment are two causes of extinction
introduced species
the passenger pigeon is an organism that has been ______ because it no longer exists anywhere i the world
extinct
_______ _______ _____ os a recovery program whereby landowners with burrowing owls on their land are asked to voluntarily maintain the owls nesting area
operation burrowing owls
Scientist gather data to learn how human activities may affect the environment then the scientist prepare ________ ________ __________ from the data
environmental impact assessment
if scientist want to monitor change over any years in an ecosystem they gather __________ ____ as a starting point
baseline data
examples of _______ ____________ are volcanic eruption,floods and tornadoes
natural disturbance
spraying _________ to kill insects also may kill other organisms that are beneficial
pesticides
the whooping crane is an endangered species because it is in danger of being extinct
endangered species
scientist conduct ________ ________ to check an ecosystem’s health and effects from impacts
ecosystem monitoring
______ ________ were introduced by accident to the great lakes now they are a serious problem as they clog water pipes and deprive animals that naturally occur there of space and food
zebra mussels
________ __________ are very sensitive to environmental change if its environment become polluted it may not be able to survive it may develop physical deformities and it may stop reproducing
indicator species
scientist are concerned about endangered species today because the spreed at which living thing are becoming extinct _________ rapidly
increasing
_________ __________monitors both the abiotic and biotic parts of the ecosystem
ecosystem monitoring
____________ make good indicator species
amphibian
scientist often use ______ ________ or study areas to monitor change
permanent plots
the four types of ecosystem monitoring are _______, __________, ___________, and __________.
physical, environmental, chemical, and biological
